| PERMEABILITY AND CONSOLIDATION OF SEDIMENT MIXTURES AS FUNCTION OF SAND CONTENT AND CLAY MINERALOGY |
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| 作者姓名： | W. JACOBS W. G. M. VAN KESTEREN J. C. WINTERWERP |
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| 作者单位： | Ph. D Candidate Delft University of Technology Delft the Netherlands，M. Sc. WL|Delft Hydraulics the Netherlands，Ms. C. Ph.D. Delft University of Technology and WL|Delft Hydraulics the Netherlands |
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| 基金项目： | ACKN0WLEDGEMENT This research is supported by the Dutch Technology Foundation STW, applied science division of NW0 and the Technology program of the Ministry of Economic affairs. The authors like to thank the departments of Geotechnical Engineering and Sanitary Engineering of the Technical University Delft for using the facilities in their laboratories. |
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| 摘 要： | The current study is the first step in a systematic experimental research on the erosion behaviour of sand-mud mixtures. It concerns the effect of a varying sand content and clay mineralogy on the porosity, structure, strength and permeability of artificially generated sediment mixtures. The permeability of a sediment mixture is an especially significant parameter concerning the type of erosion that occurs. It determines if the erosion of the bed is either a drained or an undrained process, respectively indicating surface erosion or mass erosion. Measurements on various mixtures concerning the consolidation coefficient and the permeability have been executed. Results show a distinct transition of behaviour between a sand-silt dominated network structure and a clay-water matrix. The occurrence of these two types of structures appears to depend on the porosity of the volume fraction of sand related to silt, which is, therefore, an important parameter concerning the type of erosion. Finally, the study provides a valuable data set that can be used as a reference for following stages of this research on the erosion behaviour of natural cohesive sediments.
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| 关 键 词： | 渗透性 沉淀物 混合物 泥沙含量 矿物学 |
| 修稿时间： | 2006-12 |
PERMEABILITY AND CONSOLIDATION OF SEDIMENT MIXTURES AS FUNCTION OF SAND CONTENT AND CLAY MINERALOGY |
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| W. JACOBS W. G. M. VAN KESTEREN J. C. WINTERWERP.PERMEABILITY AND CONSOLIDATION OF SEDIMENT MIXTURES AS FUNCTION OF SAND CONTENT AND CLAY MINERALOGY[J].International Journal of Sediment Research,2007,22(3):180-187. |
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| Authors: | W JACOBS W G M VAN KESTEREN J C WINTERWERP |
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| Abstract: | The current study is the first step in a systematic experimental research on the erosion behaviour of sand-mud mixtures. It concerns the effect of a varying sand content and clay mineralogy on the porosity, structure, strength and permeability of artificially generated sediment mixtures. The permeability of a sediment mixture is an especially significant parameter concerning the type of erosion that occurs. It determines if the erosion of the bed is either a drained or an undrained process, respectively indicating surface erosion or mass erosion. Measurements on various mixtures concerning the consolidation coefficient and the permeability have been executed. Results show a distinct transition of behaviour between a sand-silt dominated network structure and a clay-water matrix. The occurrence of these two types of structures appears to depend on the porosity of the volume fraction of sand related to silt, which is, therefore, an important parameter concerning the type of erosion. Finally, the study provides a valuable data set that can be used as a reference for following stages of this research on the erosion behaviour of natural cohesive sediments. |
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| Keywords: | Cohesive sand-mud mixtures Erosion Consolidation Permeability Compressibility |
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